Which is a characteristic of a strong base?
it turns pink phenolphthalein colorless.
it turns blue litmus paper red.
it releases h+ ions into a solution.
it removes h+ ions from solution.

Answer is: It removes H+ ions from solution.

For example sodium hydroxide is strong base.

Chemical dissociation of sodium hydroxide in water:  

NaOH(aq) → Na⁺(aq) + OH⁻(aq).

Strong bases turn colorless phenolphthalein pink, turn red litmus paper blue and release OH⁻ ions into a solution.

Strong base removes H+ ions from solution:

NaOH(aq) + HCl(aq) → NaCl(aq) + H₂O(l).

Net ionic reaction: OH⁻(aq) + H⁺(aq) → H₂O(l).

b is the correct answer

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the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be